US Bridges

Loop 306 WB Ramp over US 87/US 277

Fair

Tom Green County, Texas · At US 87 · Structure no. 072260007002057

Built
1972
53 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
410 ft
2 main spans
Daily traffic
1,700
2013 count
Owner
State
State Highway Agency

About this bridge

Loop 306 WB Ramp over US 87/US 277 is a steel continuous stringer/multi-beam or girder carrying Loop 306 WB Ramp over US 87/US 277 in Tom Green County, Texas. It was built in 1972, so it is 53 years old, older than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 1,700 vehicles a day, roughly 5% of them trucks, projected to reach 2,380 by 2033. The structure is 410 ft (125 m) long and 32 ft wide.

Location

Open in Google Maps
CarriesLoop 306 WB Ramp
CrossesUS 87/US 277
LocationAt US 87
RouteState Highway 306
CountyTom Green County
StateTexas
Coordinates31.40391, -100.43711
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46 US tons
Inventory rating27 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length410 ft (125 m)
Longest span133 ft (40.5 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deck16 ft (4.8 m)

Traffic and service

Average daily traffic1,700 (2013)
Projected traffic2,380 by 2033
Trucks5%
Lanes on structure1
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Loop 306 WB Ramp over US 87/US 277 built?

It was built in 1972, making it 53 years old in 2025.

What condition is Loop 306 WB Ramp over US 87/US 277 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2024.

How much traffic does Loop 306 WB Ramp over US 87/US 277 carry?

About 1,700 vehicles per day (2013 count), of which roughly 5% are trucks.

How long is Loop 306 WB Ramp over US 87/US 277?

The structure is 410 ft (125 m) long with a longest span of 133 ft (40.5 m) and a deck 32 ft wide.

Who owns Loop 306 WB Ramp over US 87/US 277?

It is owned by the State Highway Agency.